Here we are, in front of the class showing more images of pick. This one has no special tags. The next one will use the border attribute to change the thickness of the border. The value of the border attribute is an integer equal to the thickness of the displayed border in pixels. The following images will use borders of thickness 0, 1, 4, and 8.
They cascade because each one causes the margin to move to the right and following material (whether text or images) uses that temporary margin.

You can create thumbnail images by using the width and height attributes. This image used a width of 20 and a height of 30. A way of creating image bars is to use a width of 100% and a height for whatever thickness you are after. For example, the following uses a width of 100% (meaning all across the browser screen, no matter the actual physical size) and a height of 20 (in pixels).
The following uses a width of 50%.
Use hspace and vspace to create space around an image. The following uses vspace and hspace of 15. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. The following uses vspace and hspace of 30. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect. This is meaningless text created to show the effect.